alternative fuels

I think there's a huge market where I am for a lawn company running on greener or alternative fuels. Think I could sign up a lot of people taking care of their own yards if they thought I could do it "greener." And they'd probably be willing to pay a premium for said "greener" service.

But don't have any idea what it costs or if it's even locally available. Not willing to exchange all my equipment for diesels or whatever, but if I could run different fuel and advertise as such with my present equipment without going broke doing it I could maybe get a lot more customers. This is a liberal hippie town.